Chris Green has been suspended from bowling after his action was found to exceed the 15-degree tolerance limit.
As a result, he was immediately withdrawn from Sydney Thunder's squad for the match against Melbourne Stars though he can still be part of the playing XI as a specialist batsman.
The veteran off-spinner is a key member of Thunder's lineup and signed the longest deal in Big Bash League history with the franchise ahead of the tournament.
Although he has picked only three wickets in seven matches this BBL season, Green's frugal economy rate in the shortest format has made him a valuable T20 commodity.
He was reported by umpires for an illegal action on January 2 during the clash against the Stars following which he was tested three days later at the Bupa National Cricket Centre in Brisbane.
Green's absence was described as a huge blow to Thunder by the BBL team's head coach Shane Bond.
“Chris is a crowd favourite, and he’s also an extremely popular member of our club,” the former Kiwi bowling great said.
“Sydney Thunder signed Chris to a long-term deal with the club because of his leadership qualities and obvious talent. He’s an important part of our future and the club will support him through this process.”
Green's suspension from bowling duties will last 90 days, though he can be allowed to bowl in premier cricket with the permission of Cricket New South Wales.
Once the 90-day ban comes to an end, he will require another test to determine whether he can bowl in the future or not.
Thunder are expected to announce Jason Sangha as the replacement player for Green for the remainder of the competition.